Furnace



D. LARKIN Aug. 30, 1932.

FURNACE Filed May 27, 1929 2 Sheets-Sheet 1 VV 7 a 3 M14 m P w O w 3 A a D. LARKIN Aug. 30, 1932.

FURNACE Filed May 27, 1929 2 Sheets-Sheet 2 gwuento'a:

Patented Aug. 30, 1932 DAVID LARKIN, or. WEBSTER Gnovns, ivriss'ounr summon Application filed May 27, 1929. Serial No. 366,430.

This invention relates broadly to furnaces and the like, and has more particular referenceto a furnace used for heating kettles and v the like containing oil or other substances that are being, boiled or otherwise heattreated therein and which may be easily ignited accidentally if placed over an open flame in the ordinary manner. Y

The principal purpose of the invention is n! to provide a furnace having an, opening over which to place kettles and other external objects to bevheated, and in which the'flame is projected from the combustion chamber squarely against the kettle and doubled back upon itself and withdrawn into a flu-efinstead of being forced out of theopening and over the sides of the kettle. V

Other objects and advantages, some of Y which are more or less ancillary 'to'the main zn' purpose of the invention, will appear in the course of the following description of a preferred embodiment of this invention.

In the. accompanying drawings forming part of this specification, in which like num- 2: bers of reference denote like parts wherever they occur, M I V Figurel is a plan view of a furnace construct'ed'in accordancewith this invention;

Figure2 isa vertical sectional view taken on the line 2- 2 in Figure 1;

'-Figure 3 is a front elevation taken on the line33 in Figure 2; i

view taken on the line 44 in Figure 2;.

' Figure 5 is a plan viewof a battery of furnaces, showing the manner of connecting them to the breeching; and i Figure 6 is. a transverse vertical sectional view taken on the line -6 in Figure 2.

The furnace is preferably installed in the basement 1 of a suitable building 2 immediately under the ceiling 3, a hole 4 being made in the concrete floor slab 5 which separates thebasem'ent from the'fioor above. The hole I4=is preferably cylindrical, and is'lined with lower portion 16, and the upper portionof Figure 4 is a transverse vertical sectional a ring 6 of refractory material, which pro jects below the bottom of the slab. 5. The "furnace comprises-sidewalls 7 disposed on op- V 'positesidesofthe duct or opening 44mm wall 8, rear wall 9,'bott om wall 10, and arched 50 top walls 11' and 12. Arch-11 covers the spraylng chamber 13 at the front portion of the. furnace,v and the spraying chamber. 13 enlarges upwardly at its rear end into a combus'tion chamber 14, the arch 12'ofthe com- 7 bustion chamber being connected to the arch 11 by a vertical offsetwall 15. "Bear wall 9 has a forwardly and downwardly stepped the. wall extends, vertically upward through the duct 4 nearly to the level ofthe top of the slab 5, dividing the duct into apassage 17 of I substantially semi-circular cross-section and into a passage 18 on the other side of the wall 7 9. The wall 9 and steps 16 are arcuate in horizontal cross-section, presenting their convex side 19 to the combustion chamber 14 and passageway 17 The concave side 20 of the passageway 17 is corbeled at its lowerend or juncture 21 with the vaulted ceiling 3 and side walls 4. The bottom of the furnace rests on channel beams 22, the ends of which are supported on walls 23, forming downward continuations of the walls 7 to the basement floor 24. The front and side walls 8 and 7 are reinforced and braced by an angle-iron frameworkc25, secured at the bottom to the beams 22 and at the top cemented in recesses. or pockets 26 formed in the underside of the slab 5. Suitable brick 27 may be interposed between the floor beam 28 and the wall 15. A transverse wall 29 behind Lthe wall 9 extends from basement floor 24 to aheight approximately midway between the bottom of the furnace and the floor slab 5. A pair of spaced apart channel beams 30 bridge the space intervening between the wall 29 and the outer wall 31 of the. building, one end of each channel resting on the wall 29, and the other end being cemented in a recess 32 in the wall 31. Walls 33 are built on the channels 30 from a breeching 34 to the wall 9. A horizontal block of tile 35, supported at opposite sides in recesses 36 in the lower portion of the walls 33, and a horizontal block of tile 37, supported at opposite sides in recesses 38 in the upper portion of the walls 33, in conjunction with the walls 33, form a flue 39 conveying the products or gases of combustion from the passageway 18 to the breeching 34.

An angle iron 40 is secured to the top side of the slab 5 at the rear of the opening 4 and transversely to the furnace by any suitable fastening means, such as expansion bolts (not shown) the floorslab 5 preferably being recessed to receive the horizontal flange 41 w of the angle iron 40 so that the upper surface of the flange 41 is on a level withthe top.

of the floor. Channel beams '42 are arranged transversely to the iron 40 on eitherside of the opening4, and have one of their ends superimposed on the angle iron 40 and secured thereto by a clamping plate '43 and bolt 44. The beams are arranged with their flanges 45 projecting upwardly and serve as guides for the wheels of a portable kettle, not shown, that is to be placed over the opening 4.

'The fuelused in the furnace is preferably oil, and a combustion block 46, having ac entral opening 47 therein for the introduction of air and oil to the furnace, fits in an opening .48 therefor in the front wall 8 of the furnace so as to be easily removable. Other open-- ings 49 in the wall 8 on either side-of. the

opening 48 are closed with loosely fitting blocks or bricks 50,-which may be easily removed to permit inspection. of the-interior of the furnace and to admit more or less addi-' tional air to the chamber 13.

Fuel oilpasses from the pipe 51, andcompressed air from the pipe 52, tothe injector 53,,which projects an atomized mixture of air and oil through theopening 47. into the spraying chamber 13 and-also against the stepped splash wall portion 16-. The fuel burns in the chamber 14, the ignited gases and products of combustion rushing upwardly through the passage 17 against the bottom of the kettle and then being deflected laterally-through the shallow space over the top. ofthe wall 9 and down into the passageway 18 and from thence through the flue 39 into" the breeching 34. The shallow 'space above the wall Qinsuresthat'the fiamewill touch the bottom of the kettle, and the. arcuate" able means not shown, such as a bloweror in-.

j ector, or by connecting a boiler to the breeching. The walls 9 and 33 forming sides of the passageway 18 are preferably beveled at their upper ends as at 55 to assist the flow of heated gases into the passageway 18.

Having thus fully described this invention, I hereby reserve the benefit of all changes in form, arrangement, order, or use of parts, as it is evident that many minor changes may be made therein without departing from the spirit of this invention or the scope of the following claims.

I claim;

1. A furnace having an upright at the top, a transverse vertical wall in the duct extending nearly to the top and dividing the duct into separate passageways for assenting a horizontally convex-arcuate side to the passageway for the ascending gases thereby increasing the cross-sectional area thereof, a combustionchamber communicating with the lower portion of the last-mentioned passageway, and a flue communicating with the lower portion of the other passageway.

2. A furnace having a vertical duct open at the top, a transverse vertical wall in the duct extending nearly to the top and dividing the duct into separate passageways for ascending and for descending gases, the side .of the wall presented to the'passageway for the descending gases being beveled at'its upper edge to increase the cross-sectional area of the entrance of the passageway for descending gases, a combustion chamber communicating with the lower portion of the passageway for the ascending gases, and a fine communieating with the lower portion of the other passageway.

3. A furnace having a vertical duct open at the top, acombustion chamber having a transverse rear wall extending upwardly through the duct'nearly to the top thereof and dividing the duct into separate vertical passageways both passageways being within the confines of the opening in the top, one of which has its lower end opening into thetop of thec-ombustion chamber, and a flue opening into aside of the other passageway.

4. A furnace for atomized fuel having a spraying chamber communicating with an opening for the introduction of fuel thereto, and presenting a combustion chamber disposed rearwardly and upwardly of said spraying chamber, said furnace being further provided with an open duct extending upwardly from said combustion chamber and a transverse wall forming the rear of said last-named chamber and adapted to divide said duct into passageways of unequal crosssectional area, said wall terminating below the top of said duct to define a horizontal passageway communicating with the passageways formed by said wall.

5. A furnace presenting a combustion duct open signature.

7 DAVID LARKIN. 

